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Analog Devices Inc. LT8610AXMSE#TRPBF
- Part No.:
- LT8610AXMSE#TRPBF
- Manufacturer:
- Analog Devices Inc.
- Package:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Datasheet:
-
LT8610AXMSE#TRPBF.pdf
- Description:
- IC REG BUCK ADJ 3.5A 16MSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,759
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Product details
Overview
LT8610AXMSE#TRPBF from Analog Devices (formerly Linear Technology) is a 42V, 3.5A synchronous step-down regulator rated for continuous operation at 175°C junction temperature, featuring internal compensation, peak current mode control, and low-ripple Burst Mode® operation. It delivers 91% efficiency at 0.5A, 3.3VOUT from 12VIN at 175°C and supports adjustable switching frequency from 200kHz to 2.2MHz - deployed in downhole oil & gas power supplies.
For engineers reviewing the LT8610AXMSE#TRPBF datasheet, LT8610AXMSE#TRPBF pinout, LT8610AXMSE#TRPBF application, or LT8610AXMSE#TRPBF equivalent, key selection criteria include its 175°C guaranteed operation, ±2% reference accuracy over full temperature range, no thermal shutdown behavior, 0.97V feedback reference, and MSOP-16 exposed-pad thermal performance.
Technical Context
The LT8610AXMSE#TRPBF implements a monolithic synchronous buck architecture with integrated high-side and low-side MOSFETs, peak current mode control, and internal compensation - enabling fast transient response and stable loop behavior with minimal external components. Its 175°C qualification includes 100% production testing at that junction temperature, not derated extrapolation.
It operates across 3.7V–42V input, regulates to 0.97V reference with ±2% accuracy from –40°C to 175°C, and supports soft-start via TR/SS pin with programmable slew rate. The PG flag asserts when VOUT reaches ±9% of target, independent of EN/UV state, provided VIN > 3.4V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.7V to 42V - supports wide industrial and downhole supply rails without pre-regulation |
| Output Current | 3.5A continuous - sufficient for powering FPGA I/O banks or sensor signal chains in harsh environments |
| Reference Voltage | 0.970V ±2% over –40°C to 175°C - enables precise output setting with minimal drift under thermal stress |
| Switching Frequency | 200kHz to 2.2MHz, adjustable via RT resistor - allows EMI optimization and inductor size reduction |
| Efficiency @ 175°C | 91% at 0.5A, 3.3VOUT/12VIN - maintains usable power conversion where conventional regulators fail |
| Junction Temp Rating | –40°C to 175°C, 100% tested - eliminates need for external thermal derating calculations |
| Quiescent Current | 26μA typical in Burst Mode® at light load - extends battery life in intermittent-sensing applications |
Pinout & Package
LT8610AXMSE#TRPBF is housed in a thermally enhanced 16-lead MSOP package with exposed pad (Pin 17), requiring soldering to PCB ground plane for θJC(PAD) = 10°C/W thermal resistance. Pin 7 is NC; Pins 5 & 6 are paralleled VIN inputs; Pins 9, 10, 11 are paralleled SW outputs; GND connects to both Pin 8 and exposed pad.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SYNC (1) | External clock sync input | Enables EMI reduction by locking switching frequency to system clock; floating prohibited |
| TR/SS (2) | Soft-start & tracking control | Capacitor-programmable VOUT ramp rate; internal 2.2μA pull-up enables simple startup control |
| RT (3) | Frequency set resistor node | Resistor to GND sets fSW; 60.4kΩ yields 700kHz typical - critical for layout-sensitive timing |
| EN/UV (4) | Enable & input UVLO input | 1.00V rising threshold; supports programmable VIN undervoltage lockout with resistor divider |
| VIN (5,6) | Main input power supply | Paralleled pins reduce IR drop and improve thermal path for high-current input routing |
| NC (7) | No connect | Not bonded internally - must remain unconnected per design; no pull-up/down required |
| GND (8) | Power & signal ground return | Return path for bottom switch; must be tied to exposed pad (Pin 17) for thermal and electrical integrity |
| SW (9,10,11) | Switch node outputs | Paralleled high-current paths to inductor/boost cap; requires minimized PCB copper area to limit ringing |
| BST (12) | Bootstrap capacitor connection | 0.1μF ceramic cap placed adjacent to IC enables gate drive above VIN for high-side MOSFET |
| INTVCC (13) | Internal 3.4V regulator bypass | Requires ≥1μF local ceramic decoupling; supplies internal logic - not for external loading |
| BIAS (14) | Efficiency-optimized bias supply | Tie to VOUT ≥3.3V to reduce input current draw and improve light-load efficiency |
| PG (15) | Power good open-drain flag | Asserts high when VFB within ±9% of regulation - valid even if EN/UV is inactive, if VIN > 3.4V |
| FB (16) | Feedback voltage sense | Regulated to 0.970V; requires phase-lead capacitor (4.7–10pF) between FB and VOUT for stability |
| GND (17) | Exposed thermal pad | Must be soldered to PCB ground plane; primary thermal path - accounts for >70% of heat dissipation |
Key Features
| Feature | Design Value |
|---|---|
| 175°C Junction Operation | 100% production-tested at 175°C - eliminates thermal margin uncertainty in downhole or engine bay designs |
| Low-Ripple Burst Mode® | Maintains <10mVPP output ripple at light loads while achieving 26μA quiescent current - ideal for always-on sensors |
| No Thermal Shutdown | Continuous operation up to 175°C without fault shutdown - avoids system resets during sustained high-temp exposure |
| Internal Compensation | Reduces external component count by eliminating compensation network; enables use of small 4.7μH inductors |
| Programmable Soft-Start | TR/SS pin controls VOUT ramp rate via capacitor - prevents inrush current in multi-rail systems |
| Power Good Flag | PG signals regulation status independently of enable state - enables robust sequencing in safety-critical systems |
Applications
| Downhole Drilling Sensors | Avionics Power Distribution |
|---|---|
Use Scenario: Powering MEMS accelerometers and pressure transducers inside drill string telemetry modules operating continuously at 175°C ambient. IC Role / Device Role / Timing Role: Primary 3.3V/5V point-of-load regulator supplying analog front-end and ADC reference circuitry. Use Value: Maintains 91% efficiency and ±2% output accuracy at 175°C - avoids thermal runaway and ensures sensor calibration stability over extended runs. | Use Scenario: Generating 5V rail for flight control interface boards mounted near jet engine compartments with transient ambient spikes to 150°C. IC Role / Device Role / Timing Role: High-reliability DC/DC converter with PG flag used for power sequencing validation before flight computer boot. Use Value: No thermal shutdown behavior prevents unexpected resets during thermal transients; PG assertion confirms regulation before downstream logic activation. |
| Industrial Motor Drive Control | High-Temp Battery Management |
Use Scenario: Supplying isolated gate drivers and current-sense amplifiers on motor control PCBs located adjacent to IGBT heatsinks. IC Role / Device Role / Timing Role: Compact 3.5A buck regulator delivering clean 5V to analog sensing and PWM logic circuits. Use Value: MSOP-16 exposed pad reduces θJA to 40°C/W - sustains full load without external heatsink in space-constrained enclosures. | Use Scenario: Providing regulated 3.3V for microcontroller and coulomb counter ICs in lithium-thionyl chloride battery packs deployed in desert geothermal monitoring stations. IC Role / Device Role / Timing Role: Low-quiescent-current step-down regulator enabling multi-year standby life with periodic wake-up cycles. Use Value: 26μA Burst Mode® IQ preserves battery capacity; BIAS pin connection to VOUT further improves light-load efficiency. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-temperature synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LTC3310S | Rated to 150°C (not 175°C); 3A output; uses constant-on-time control instead of peak current mode | Lacks 175°C qualification and 3.5A rating - unsuitable for downhole or extended high-temp operation | Select only if ambient ≤150°C and 3A suffices; verify thermal margin with θJA = 42°C/W |
| MPQ4436AGL-A | Rated to 125°C; 4A output; requires external compensation; no 175°C testing or guarantee | Higher current but lower temperature rating - requires derating and additional stability analysis | Consider only for non-critical industrial applications below 125°C; not drop-in for LT8610AXMSE#TRPBF |
Compared with LTC3310S and MPQ4436AGL-A, the LT8610AXMSE#TRPBF uniquely provides production-verified 175°C operation, integrated compensation, and guaranteed 3.5A output without thermal shutdown - making it the sole option for mission-critical downhole or aerospace power stages demanding absolute thermal reliability.
Availability
LT8610AXMSE#TRPBF is available at Aetrix Electronics and suitable for downhole drilling telemetry, avionics power distribution, and industrial motor drive control requiring stable component supply across extreme temperature lifecycles.
Supply support for LT8610AXMSE#TRPBF includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices, Inc. (ADI) is a global semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies - acquired Linear Technology in 2017 to expand precision power and signal conditioning portfolios.
The LT8610AXMSE#TRPBF belongs to ADI's high-temperature power management product line, engineered specifically for operation in oil & gas, aerospace, and industrial environments where standard ICs fail due to thermal stress.
FAQ
What is the maximum guaranteed junction temperature for the LT8610AXMSE#TRPBF?
The LT8610AXMSE#TRPBF is 100% production-tested at 175°C junction temperature and rated for continuous operation across –40°C to 175°C. Unlike derated specifications, this is a guaranteed minimum performance limit - no thermal shutdown circuitry is included, and devices operate fully functional at this temperature.
Does the LT8610AXMSE#TRPBF require external compensation components?
No, the LT8610AXMSE#TRPBF features internal compensation optimized for peak current mode control. This eliminates the need for external Type II or Type III compensation networks, reduces BOM count, and enables stable operation with small 4.7μH inductors - confirmed across the full –40°C to 175°C range.
How does the LT8610AXMSE#TRPBF achieve low quiescent current at high temperature?
The LT8610AXMSE#TRPBF achieves 26μA typical quiescent current at 175°C using proprietary low-power Burst Mode® operation. This architecture skips switching cycles under light load while maintaining tight output regulation and low ripple - verified in production test at temperature, not extrapolated.
Can the LT8610AXMSE#TRPBF be synchronized to an external clock?
Yes, the LT8610AXMSE#TRPBF includes a dedicated SYNC pin (Pin 1) that accepts external clock signals from 200kHz to 2.2MHz. Synchronization enables EMI reduction in dense PCB layouts and deterministic noise placement - critical for sensitive analog or RF subsystems sharing the same board.
What is the function of the BIAS pin on the LT8610AXMSE#TRPBF?
The BIAS pin on the LT8610AXMSE#TRPBF allows the internal regulator to draw bias current from VOUT (when ≥3.3V) instead of VIN, improving light-load efficiency. When tied to VOUT, it reduces input current draw and minimizes power loss - a key advantage in battery-powered or energy-harvesting applications using the LT8610AXMSE#TRPBF.
LT8610AXMSE#TRPBF Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 16-TFSOP (0.118", 3.00mm Width) Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.7V
- Voltage - Input (Max):
- 42V
- Voltage - Output (Min/Fixed):
- 0.97V
- Voltage - Output (Max):
- 39.7V
- Current - Output:
- 3.5A
- Frequency - Switching:
- 200kHz ~ 2.2MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-MSOP-EP
LT8610AXMSE#TRPBF FAQ
1.How can I place an order for LT8610AXMSE#TRPBF through Aetrix?
Please submit a Request for Quotation (RFQ) for LT8610AXMSE#TRPBF on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LT8610AXMSE#TRPBF reliable?
The price and inventory of LT8610AXMSE#TRPBF are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LT8610AXMSE#TRPBF is usually 5 days.
3.What payment methods are accepted for LT8610AXMSE#TRPBF?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LT8610AXMSE#TRPBF transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LT8610AXMSE#TRPBF?
LT8610AXMSE#TRPBF orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LT8610AXMSE#TRPBF order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LT8610AXMSE#TRPBF?
For technical support, including LT8610AXMSE#TRPBF datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LT8610AXMSE#TRPBF requirements.
6.How does Aetrix verify that LT8610AXMSE#TRPBF is sourced from the original manufacturer or authorized distributors?
All LT8610AXMSE#TRPBF products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LT8610AXMSE#TRPBF meets industry standards.
7.What is the process for return or replacement of LT8610AXMSE#TRPBF?
All LT8610AXMSE#TRPBF units undergo pre-shipment inspection (PSI). If there is an issue with LT8610AXMSE#TRPBF, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LT8610AXMSE#TRPBF part is unused and in its original packaging.
Return procedure for LT8610AXMSE#TRPBF:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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